New: Add A extension decoding

New: Add back logging in AXI4 RAM
Change: Set Verilator as default simulator
Change: Remove icarus of CI because its slowness since AXI4 fabric upgrade
Change: Update svlogger
Change: Remove fst dump in verilator c++ top level
Change: Replace NO_VCD define w/ NO_WAVE define

Author: dpretet

.github/workflows/ci.yaml

@@ -17,63 +17,50 @@ jobs:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v2
-      - run: brew install icarus-verilog
       - run: iverilog -V
       - run: brew install verilator
       - run: verilator -V
       - run: brew install md5sha1sum
       - run: git submodule update --init --recursive
-      - run: ./flow.sh sim wba-testsuite core icarus
       - run: ./flow.sh sim wba-testsuite core verilator
-      - run: ./flow.sh sim wba-testsuite platform icarus
       - run: ./flow.sh sim wba-testsuite platform verilator
   Privilege-Security-Testsuite:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v2
-      - run: brew install icarus-verilog
       - run: iverilog -V
       - run: brew install verilator
       - run: verilator -V
       - run: brew install md5sha1sum
       - run: git submodule update --init --recursive
-      - run: ./flow.sh sim priv_sec-testsuite core icarus
       - run: ./flow.sh sim priv_sec-testsuite core verilator
-      - run: ./flow.sh sim priv_sec-testsuite platform icarus
       - run: ./flow.sh sim priv_sec-testsuite platform verilator
   RISCV-Compliance:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v2
-      - run: brew install icarus-verilog
       - run: iverilog -V
       - run: brew install verilator
       - run: verilator -V
       - run: brew install md5sha1sum
       - run: git submodule update --init --recursive
-      - run: ./flow.sh sim riscv-testsuite core icarus
       - run: ./flow.sh sim riscv-testsuite core verilator
-      - run: ./flow.sh sim riscv-testsuite platform icarus
       - run: ./flow.sh sim riscv-testsuite platform verilator
   C-Testsuite:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v2
-      - run: brew install icarus-verilog
       - run: iverilog -V
       - run: brew install verilator
       - run: verilator -V
       - run: brew install md5sha1sum
       - run: git submodule update --init --recursive
-      - run: ./flow.sh sim c-testsuite core icarus
       - run: ./flow.sh sim c-testsuite core verilator
-      - run: ./flow.sh sim c-testsuite platform icarus
       - run: ./flow.sh sim c-testsuite
   SV-Testsuite:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v2
-      - run: brew install icarus-verilog
       - run: iverilog -V
       - run: brew install verilator
       - run: verilator -V